Finding the Fourth Proportional to 1,805.72, 2,492.72 and 1,143.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,805.72 : 2,492.72 = 1,143.47 : x
2. Step 2: Convert to fraction form
   1,805.72/2,492.72 = 1,143.47/x
3. Step 3: Cross multiply
   1,805.72x = 2,492.72 × 1,143.47
4. Step 4: Simplify right side
   1,805.72x = 2,850,347.75
5. Step 5: Solve for x
   x = 2,850,347.75/1,805.72
6. Step 6: Final answer
   x = 1,578.51